Chemtronics

  • Safely Cleaning PCBs -- Most Important Considerations

    Cleaning printed circuit boards is always fraught with some risk; consequently, you need to weigh the need for such cleaning with the possibility of damaging the board. Naturally, if you suspect that the messiness of the PCB may be the reason behind or may lead to malfunction, then, by all means, clean away.

    If you must clean a PCB, then you need to follow certain precautions. Other considerations that should apply include:

    • What type of debris are you dealing with?

    The easiest PCB debris to get rid of is, of course, free-flowing dust—especially if you remove socketed components from the board before proceeding. Dust and particles can easily be removed with pressured air (preferably from a low-power vacuum cleaner) and a gentle brush. Grime, on the other hand, presents a more serious, albeit manageable problem. Removal thereof (especially if wax or oil is involved) may require some scrubbing and, possibly, the use of water and liquid cleaners.

    • Does the board have components that may be especially vulnerable to liquids?

    Things like cardboard-contained components, carbon film/open-frame potentiometers and older-version, water-vulnerable crystals may be especially vulnerable to liquids (including water); that goes for paper stickers. Some such items might be de-soldered/removed to make the cleaning process more feasible/easier. By all means, properly dry out the board after such cleanings—possibly with the use of the oven set at a low temperature (i.e., 170 degrees).

    • Should you consider using professional cleaning supplies, equipment and techniques?

    In addition to special cleaning agents (i.e., “Brasso”), there are special techniques/services that you can employ, including media blasting, ultrasonic cleaning, and media tumbling. You can also hire people who specialize in such services or avail yourself of the literature on PCB cleaning fundamentals.

    Conclusion:

    Dealing with unclean PCBs is not just a matter of aesthetics. Debris and gunk in PCBs can hamper performance and, in the long run, lead to malfunction. By following strict protocols and cleaning PCBs only when absolutely necessary, though, you can avoid unnecessary, possibly expensive trouble.

    If the board is tainted with left-over solder flux, then you may use either flux remover or rubbing or anhydrous alcohol, making sure to dry the surface with lint-free towels/tissueThinkingEngineer

  • Why Compressed Air Dusters make electronic repairs easy and help maintain circuit boards

    As anyone who has ever looked inside electronics devices knows, they collect dust and fuzz like nobody's business. Technicians can tell you that first, electronics in use in virtually any environment from the home to the office are constantly exposed to dust (and, in the home environment, pet hair) and that secondly, the electrostatic charge that any electronics device generates attracts dust like a magnet does iron filings. It doesn't matter if the electronics device is a TV, home entertainment system component or computer, if its been in use any length of time, it'll have dust inside.ES1017

    The first thing a tech will do is use a product like Chemtronics ES1017 Duster to blow out the dust. Believe it or not, clearing the dust out of a system may actually repair a problem as some dust particles can be electrical conductors, making bad circuit connections and causing issues. Also, clearing the dust and debris out of a system with compressed air enables the technician to work in a clean environment which, in the case of computers that haven't seen a lot of maintenance can be very dirty indeed.

    In those cases, using a product like Chemtronics ES1024 Typhoon Blast Duster or Chemtronics ES1020 Ultrajet Duster with a heavier compressed air spray can make a huge difference. Dust not only can cake over chips and other components but can work its way under components and boards as well. With the higher pressure, that dust can be blown out where using a normal compressed air spray will require several tries to do it or won't do the job at all. Some dust "infestations" can actually leave a layer of fuzz on a circuit board that can literally be peeled away in a sheet before any duster can be used and in severe cases like these, having a high pressure duster is imperative.

    In normal situations, especially when a technician is doing maintenance runs, having an inexpensive duster like Chemtronics ES1217 Economy Duster is the best tool he'll have in his kit. Doing maintenance runs in an office environment is one of those necessary evils that may be boring to do, but saves time and money since keeping computers well-maintained is much easier than trying to repair them later and having a good supply of compressed air makes life a lot easier for a technician as well.

    When working on electronics, dust and debris is an unavoidable issue that any technician can tell you is simply part of the job. With compressed air to blow the dust and junk out of the device, not only can the technician get to work on the problem, using compressed air to maintain a system can actually keep problems from happening in the first place.

  • Using Compressed Air Dusters to clean Electronic Circuit Boards

    As anyone who has ever looked inside electronics devices knows, they collect dust and fuzz like nobody's business. Technicians can tell you that first, electronics in use in virtually any environment from the home to the office are constantly exposed to dust (and, in the home environment, pet hair) and that secondly, the electrostatic charge that any electronics device generates attracts dust like a magnet does iron filings. It doesn't matter if the electronics device is a TV, home entertainment system component or computer, if its been in use any length of time, it'll have dust inside.

    The first thing a tech will do is use a product like Chemtronics ES1017 Dusteres1017es1217 to blow out the dust. Believe it or not, clearing the dust out of a system may actually repair a problem as some dust particles can be electrical conductors, making bad circuit connections and causing issues. Also, clearing the dust and debris out of a system with compressed air enables the technician to work in a clean environment which, in the case of computers that haven't seen a lot of maintenance can be very dirty indeed.

    In those cases, using a product like Chemtronics ES1024 Typhoon Blast Duster or Chemtronics ES1020 Ultrajet Duster with a heavier compressed air spray can make a huge difference. Dust not only can cake over chips and other components but can work its way under components and boards as well. With the higher pressure, that dust can be blown out where using a normal compressed air spray will require several tries to do it or won't do the job at all. Some dust "infestations" can actually leave a layer of fuzz on a circuit board that can literally be peeled away in a sheet before any duster can be used and in severe cases like these, having a high pressure duster is imperative.

    In normal situations, especially when a technician is doing maintenance runs, having an inexpensive duster like Chemtronics ES1217 Economy Duster is the best tool he'll have in his kit. Doing maintenance runs in an office environment is one of those necessary evils that may be boring to do, but saves time and money since keeping computers well-maintained is much easier than trying to repair them later and having a good supply of compressed air makes life a lot easier for a technician as well.

    When working on electronics, dust and debris is an unavoidable issue that any technician can tell you is simply part of the job. With compressed air to blow the dust and junk out of the device, not only can the technician get to work on the problem, using compressed air to maintain a system can actually keep problems from happening in the first place.

  • Using Compressed Air to trouble shoot circuit boards : Freeze Sprays

    Chemtronics_ES1052_FreezeSprayAll too often, troubleshooting a problem with a computer or other device that uses printed circuit boards turns into a long, drawn-out process. That's because figuring out exactly which board in the computer, printer, rack unit or whatever electronic device you're working on isn't always a cut and dried process. While shotgunning the problem by swapping boards out at random until the problem goes away may work, if the problem is a heat related issue in a chip, the problem could easily mask itself, letting the technician think the problem is fixed, only to have it crop up again later. Nobody hates having to come back to a service call or a repair more than the technician.

    One way to track down heat related problems, whether it be a circuit that is broken as components expand because of the heat or a chip that overheats and fails is to use freeze spray. Freeze sprays allows the technician to lower the temperature of different circuit boards, hopefully temporarily correcting the problem and allowing the tech to troubleshoot the system without shutting down and swapping boards. As too many techs know, doing that is too often counterproductive.

    However, you can't simply use some type of compressed air to cool boards. While flipping some aerosols and using the propellant as a cooling agent may work, you may actually cause more damage because of moisture and corrosive chemicals contained in the propellant. Freeze sprays like Chemtronics ES1052 Freeze Spray are designed to be safe for both boards and components and are designed to be used in "live" environments to help troubleshoot problems.

    Furthermore, using a freeze spray like Chemtronics ES1051 ESD-Safe Freez-It Freeze Spray are designed to be used in areas where electro-static dispersal is essential for circuit board protection. Anyone who works with computers and other sensitive electronics knows full well the damage static electricity can do and using a type of spray that causes static electricity can cause far more problems than it solves.

    Having the right tool for the job can be as simple as using something to cool down an overheated circuit to eliminate the issue once and for all. With a great freeze spray, a tech can track down the problem, replace the bad circuit board and have the repair completed within minutes instead of the hours it could take to troubleshoot the problem by shotgunning. Not only is freeze spray very effective when it comes to troubleshooting, its a very cost effective alternative to shotgunning a problem as well. If you're a tech or someone who has to troubleshoot printed circuit boards, having freeze spray on hand can save you a lot of time and a lot of money as well.ThinkingEngineer

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